GCN Circular 33656
Subject
GRB 230418A: AGILE detection
Date
2023-04-19T20:12:42Z (2 years ago)
From
Francesco Verrecchia at SSDC,INAF-OAR <francesco.verrecchia@ssdc.asi.it>
G. Panebianco (Univ. Bologna - INAF/OAS Bologna), F. Verrecchia,
C. Pittori (SSDC, and INAF/OAR) , N. Parmiggiani (INAF/OAS-Bologna),
M. Tavani (INAF/IAPS, and Univ. Roma Tor Vergata), C. Casentini,
A. Argan, M. Cardillo, Y. Evangelista, L. Foffano, E. Menegoni,
G. Piano, A. Ursi (INAF/IAPS), A. Addis, L. Baroncelli, A.
Bulgarelli, A. Di Piano, V. Fioretti (INAF/OAS-Bologna), F.
Lucarelli (SSDC, and INAF/OAR), M. Romani (INAF/OA-Brera), M.
Marisaldi (INAF/OAS-Bologna, and Bergen University), M. Pilia,
A. Trois (INAF/OA-Cagliari), F. Longo (Univ. Trieste and INFN
Trieste), I. Donnarumma (ASI), A. Giuliani (INAF/IASF-Mi), and
P. Tempesta (TeleSpazio), report on behalf of the AGILE Team:
The AGILE satellite detected the GRB 230418A at T0 = 2023-04-18
21:11:33 s (UTC), reported by Fermi GBM (GCNs #33652, #33653).
The burst is clearly visible in the AGILE scientific ratemeters
of the MiniCALorimeter (MCAL; 0.4-100 MeV), and AntiCoincidence
(AC; 50-200 keV) detectors.
The event lasted about 2 s and it released a total number of
1538 counts in the MCAL detector (above a background rate of 1100
Hz), and 7778 counts in the AC detector (above a background rate
of 3659 Hz). The AGILE ratemeters light curves can be found at
http://www.agilescienceapp.it/notices/GRB230418A_AGILE_RM_ND.png .
Additional analysis of AGILE data is in progress.
Automatic MCAL GRB alert Notices can be found at:
https://gcn.gsfc.nasa.gov/agile_mcal.html